July in Bozeman is the sunniest and the warmest month of the year. In July, the weather in Bozeman is typically warm. Average daily high temperature in July is about 25 degrees above zero. On average, Bozeman has 26 sunny, 4 partly cloudy, and 1 rainy day in July. The rains are usually light. July as well as August is considered the most comfortable time to visit Bozeman.